Take three journalists, asking them the question, "Are we alone in the
Universe?"

This gives birth to a very good book "Sommes-nous seuls dans l'univers?" edited by Fayard (ISBN 2-213-60554-8).

Jean Heidmann is the only one who really promotes SETI. The three other
use the Fermi Paradox and the cosmic calendar (imagine that the big-bang
happened on 1st January 1999) to argue that there is probably no
intelligent life out there (but that they would like to find one and
that they encourage SETI listening). They think space travel will be
available to us within the next 3 centuries.

I was a bit surprised with this "use" of the Fermi Paradox. Personally,
I use it to show that it's better to look for signals than to wait for
flying saucers, since the distances in space are too great.

I met Jean Heidmann just once, so I can't say that I know him. In his
previous books, he appears as "a professor", always teaching "serious"
things. In this interview he speaks about great projects (radio telescope
on the Moon, solar lens) with enthusiasm. He also mentions Dyson
spheres and the search by Jun Jugaku for infrared signals using the IRAS
satellite.
He also speaks about Nanšay, and the need of private investments to
maintain the radio telescope. The observatory could be closed within five
years.

Alfred Vidal-Madjar is known for a book about the discovering of new
planets. He is rather pessimistics but I was really impressed by his
explanations and the way he builds pictures to give an idea of the size
of the universe.

Nicolas Prantzos works in nuclear astrophysics. He seems to ignore
optical SETI projects. He refers to Robert Forward's idea about LASER
propulsion. When the journalist asks "can't we use this LASER emission
to send a signal to some civilisations?" he answers "Radio waves are
better. They are less energetic. There is no absorption by the gas and
dust of our Galaxy. That's the reason why the people working for SETI
use radio telescopes." He also explains that there are few biologists in
the SETI search but a lot of physicists and astronomers. For him, when
you think how complicated life is, it's easy to think that we are alone.

Hubert Reeves answers more "philosophical" questions about life, Earth,
and so on.

I don't know if the book will be translated into English, or if some
similar book already exists. The idea of interviewing four astronomers is
rather original, and nothing had been written about SETI in France since
1992.